Morihei Ueshiba (O'Sensei) (1883-1969), founder of Aikido
O'Sensei and Morihiro Saito Sensei (1928-2002), (founder with student of 23 years)
Morihiro Saito Sensei and Michael Field Sensei (sensei and student of 24 years)
Michael Field Sensei and Peter Sceney (sensei and student of 25 years)